Thank you, good review! l like sylon and i needmoney (but the way the are checking bounty content (articles, videos) i don't like). I didn't find in your list Aeris2, i like the way he is working and i like his campaign. One important difference is the limited number of participants in signature and twitter campaign.
Actually make limited participant in some campaign is good for bounty hunter to gain much more imcome.
But its not really good for the project itself because normally more people spread the world and more people will notice the existance of the ico. But aerys2 has his own rule. Sylon also has big pool for signature and i like to join him.
Only now in the company of the signature of aerys2 is very difficult to participate, because quickly recruited 100 people, as it was with the project beaxy